Audio problem: At the start, Sara is driving her moped at the school. Jen arrives and asks, 'Guess what?' Then she says, 'We gotta find Rudy. Come on.' When she says 'Come on,' her mouth doesn't move. (00:17:20)
Continuity mistake: After Willie sees his partner's head in the washing machine, he panics and walks backwards. He trips over the dead body of his partner, he falls over his body and his arms are straightened out, but when you see him next his arms are straight against his waist and hips. (00:09:25)
Continuity mistake: When you see Freddy being interviewed you see Nora watching him on the TV, the camera is at a reverse angle and you see that her hand is somewhere round her face and her head tilts but in the very next shot,she doesn't have her hand near her face and also her head is completely still. (00:30:30)
Continuity mistake: In the scene after the fake skeleton breaks through the wall Donna puts her mahogany coloured top back on. In a few seconds she kneels down to pick up her camera equipment from the floor without anything with her, but seconds later, when she grabs her camera gear, she has the small camera attached to her ear. (00:53:15)
Visible crew/equipment: When you see the two women at the mental institution, the camera angle is at their backs, the woman on the left is curious about Michael Myers. Before the other says that she decapitated a man, you see down the end of the hallway a man kneeling down, possibly a crew member. In the next shots of the hallway, he is gone. (00:03:10)
Continuity mistake: When Jenny is about to take her top off, in the close up you see that the shirt is lifted halfway up from her bra. In the very next shot when the camera is over Bill's shoulder, her shirt is only lifted a few centimeters below her bra. (00:39:30)
Plot hole: When Busta Rhymes says "Cut the camera. Cut the camera" when he is attacked by the kids. Who is turning all of the cameras off at once? Prior to that scene, he runs into the real Michael Myers and has him go into the garage with Nora to "help her ass out." If he did, then I doubt she would be able to turn it off and on.
Continuity mistake: When we see Michael in the flashback with the security guard, he has on his mask from this movie, when it should be the Halloween H2O mask.
Continuity mistake: Jen's head lands at the bottom of the stairs. Later on in different scenes of the movie, it's obviously not there anymore because of all the running around downstairs and upstairs. Yet it's conveniently where it landed the first time because we see it on the monitor in the garage.
Continuity mistake: When Michael pins Rudy to the door, he uses the two knives that Rudy had in each hand. One of the knives goes clear through the door and out the other side. Michael then gets another knife from the drawer and it too goes through the other side, but the first knife that went through is now gone.
Visible crew/equipment: When the contestants are on the Myers porch, putting on their cameras, a webcam shot reveals a large portion of the soundstage the house was built in. (00:32:00)
Continuity mistake: In wide shots of Deckard at his computer, the image on the monitor shows a basic white page with black and blue lettering. In close-up shots of the monitor, the image is much more detailed, showing a colorful college chat page. (00:20:35)
Audio problem: After Donna is killed you can hear her still screaming.
Visible crew/equipment: Just after the garage has burnt down the police arrive and if you look very closely on the windshield of the first you can faintly see a camera crane lowering down. (01:18:00)
Plot hole: After Freddy kicks Michael Myers out of the window he is caught up on the camera cord outside of Judith Myers' room, which is facing the front of the house. However, when Freddy and Sara leave her room they come from the opposite side to where her bedroom is, which is the side of the house. (01:11:15)
Continuity mistake: When the garage sets on fire Freddy bursts through the door and the camera angle is over Michael Myers' shoulder and he lowers his knife in his hand and then in the next shot when you see him staring at Freddy he lowers his knife again. (01:16:30)
Continuity mistake: After Charlie gets his neck impaled by the tripod leg he is dragged along the floor with his hands up to his neck and then they go above his head but next when you see Nora on the phone to Freddy the screen behind her has Charlie with his hands on his neck again. (00:29:15)
Continuity mistake: When all of the six are around the table lighting the candles, you can see Jen shine her torch up to her face, but in the next shot with the four way split screen, her torch is not lit. (00:37:25)
Continuity mistake: When Freddy pours the wine into the glasses with Nora, the screen behind him has a lantern held by Bill. Next, when Michael Myers breaks through the mirror Bill is struggling in agony, and in the next shot when you see the screen behind Freddy, the motions are the same as it was twenty seconds ago. (00:43:10)
Answer: At first impression, Laurie was catatonic not only from the shock of killing an innocent man, but also from a lifetime of being chased down by her murderous brother. She obviously knows from past experiences that nothing she does (including faking her own death) will stop Michael from finding her. It is later revealed she has been faking her mental issues (think when she has been hiding her regular meds in the raggedy Ann doll) and is committed only to stopping Michael, no matter what the cost. She may have also been trying to protect her son and the only way to do that is to allow herself to be institutionalized in order to lure Michael there.